"Tongue Piercing May Speed Tooth Loss, Researchers Say" is the headline of an article. The article...
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"Tongue Piercing May Speed Tooth Loss, Researchers Say" is theheadline of an article. The article describes a study of51 young adults with pierced tongues. Theresearchers found receding gums, which can lead to tooth loss, in16 of the participants.
(a) Construct a 95% confidence interval for the proportion ofyoung adults with pierced tongues who have receding gums. (Roundyour answers to three decimal places.)
( , )
(b) What assumptions must be made for use of the zconfidence interval to be appropriate? (Select all that apply.)
1) The sample is voluntary.
2) The sample is a random sample.
3) The sample is independent.
4) The sample size is large.
"Tongue Piercing May Speed Tooth Loss, Researchers Say" is theheadline of an article. The article describes a study of51 young adults with pierced tongues. Theresearchers found receding gums, which can lead to tooth loss, in16 of the participants.
(a) Construct a 95% confidence interval for the proportion ofyoung adults with pierced tongues who have receding gums. (Roundyour answers to three decimal places.)
( , )
(b) What assumptions must be made for use of the zconfidence interval to be appropriate? (Select all that apply.)
1) The sample is voluntary.
2) The sample is a random sample.
3) The sample is independent.
4) The sample size is large.
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